Tech/media companies dependent on advertising should just adapt. As techies told a complaining music industry, just do concerts and sell t-shirts. Now maybe this won't be as profitable as the current business model, and maybe the industry will be smaller and more consolidated, but that's capitalism. No one guaranteed you would keep growing and making more money.

Perhaps you'll have to stop using third-party ad networks and start selling and creating your own ads. Native ads like Buzzfeed's sponsored posts could work. It'll probably require more capital and won't scale as well, but you'll just have to deal with that.